彭佳嶼為北方三島之一，是位於臺灣北方的火成岩小島，上面有一座建在火山口上的燈塔，以及一座小型氣象站，對預測颱風與海洋氣候的資料蒐集非常重要，島上只有氣象站人員及海巡人員駐守。

Xiao-Yuan's home is destroyed by an excavator, forcing her to find a new one. Along the way, she crosses dangerous roads and narrowly escapes being caught by humans. Can she find a home where she won’t worry about food or human interference?

Ah-Hai meets a mermaid poisoned by a nearby chemical factory's pollution. With his friends, he records evidence of illegal wastewater discharge and reports it to the authorities. The factory is finally shut down, and the water gradually becomes cleaner. But as Ah-Hai continues beach cleaning, he wonders if this will ever be enough to make the ocean truly clean?

Boss Crab lives in the coastal forests of Banana Bay, Kenting - home to Taiwan's richest land crab diversity. Each night, mother crabs carrying eggs bravely cross roads to reach the beach. Luckily, local residents keep a close eye on the traffic during the breeding season, helping the crabs reproduce safely year after year.

Tripitaka and his disciples receive a new mission: retrieve the "Environmental Sutra" from the West. On the way, they discover ocean trash, oil spills, and illegal wastewater dumping by factories. Watch how Sun Wukong uses his powers to clean up the sea and restore balance to nature.

Jack rescues Hailey, the messenger of the Dragon King of the Sea. She takes him deep underwater to meet the weakened Dragon King, who tells them that many sea creatures are suffering because of human pollution. Hailey explains that if everyone reduces plastic in daily life, the ocean can begin to heal.

Bona is a lionfish who feels lonely. She has no neighbors, no friends, and wonders where she truly belongs. Determined to find her home and companions, Bona sets off on a heartfelt journey to find herself.

Johnny from the United States is excited to attend Xiao Ding and Xiao Mei 's wedding in Taiwan. But he notices something odd - every dish on the menu says "MahiMahi." Curious, he asks Xiao Ding 's cousin Da-Gu what it means. Follow Johnny to discover the story behind this mysterious fish!

On the way home, sea turtle Xixi records his journey with a camera. He sees plastic bags drifting in the ocean, coral reefs turning white, and waters of a strange, unnatural color. Even the hermit crabs in his hometown now live in plastic shells. After returning, Xixi looks at his photos and wonders what changes he will see next time he comes back.

Grandma sends Xiao Zhi to the market to buy squid. But the stalls are full of creatures that look alike - squid, calamari, cuttlefish, and reef squid. Xiao Zhi can’t tell which is which! Luckily, Mr. Wang, the friendly fish vendor, explains how to tell them apart. Let’s learn together with Xiao Zhi.

A little fish gets a hat stuck on its head. It swims and swims, hoping another fish can help remove it. Along the way, it meets a scary shark and a rushing dolphin. Will the "hat fish" finally get the hat off?

Tete wants to make friends, but all sea creatures avoid him. He sets out on a journey of self-discovery, only to see that the ocean and beaches are full of others just like him - plastic bottles. Then Tete finally understands why no one wants to be around him.

A little whale goes out with her mother to visit ocean friends, but all she sees are floating plastic bags and straws. They meet an octopus whose home is piled with trash. The little whale asks her mother why the sea looks like this, but her mother stays silent and keeps swimming...

Lele the sea turtle loves helping others. While exploring the ocean, he comes across a seahorse stuck on a hook and a clownfish trapped by a plastic straw. Eventually, he sees humans cleaning the beach, and at last, he and his friends can swim freely in a clean ocean.

Xiao Xian finds a stranded orca on the beach. As she's trying to help, she gets swept into the sea, and she discovers she has turned into an orca! Chased by sharks and trapped by nets, can Xiao Xian find a safe way out?

Little Anchovy and its siblings are swimming happily when they get caught in a fishing net. Just as they lose hope, a mysterious voice comes to help them escape. What did the voice say? Let's find out together!